A dark-hooded variant of Asclepias amplexicaulis
Uttal, Leonard J., 1918-2005
Article
1955
Rhodora
57
336--337
BioStor
[Cambridge, Mass., etc.], New England Botanical Club [etc.],
BioStor: https://biostor.org/reference/139264
In copyright. Digitized with the permission of the rights holder.
https://biodiversitylibrary.org/permissions
http://creativecommons.org/licenses/by-nc-sa/3.0/
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